#include <Eigen/Dense>
#include <iostream>

using namespace Eigen;
using namespace std;

int
main()
{
	MatrixXf m(2, 2);
	m << 1, -2, -3, 4;

	cout << "1-norm(m)     = " << m.cwiseAbs().colwise().sum().maxCoeff()
		 << " == " << m.colwise().lpNorm<1>().maxCoeff() << endl;

	cout << "infty-norm(m) = " << m.cwiseAbs().rowwise().sum().maxCoeff()
		 << " == " << m.rowwise().lpNorm<1>().maxCoeff() << endl;
}
